we can only tell u as much as the first page of this post can tell u regarding mechanical keyboard's different switches.
the rest, can only be completed with your own fingers.
that is to say, you reallyreally really need to go try it out with your fingers to know and understand what mechanical keyboard is

don't quite get you there

the difference of typing feel is different across the 3 different type of switches, mainly blue, brown and black/red (black and red are the same switch, just that both have different spring tension)
refer to first page for the different type of switches

If you like to type hard u might go for mx black

Regarding durability, it's the same.
Each kind of cherry switches have lifespan of 50 millions operation life cycles.

You can try blue and see. I believed it is quite tiring to type on green.
I managed to type blue during morning, noon.
During night, my fingers already reached fatigue level, then I will type using MX brown keyboard because lighter a little. 

I use modded mx black for pure typing.
they feel great.
makes me think again whether to put all my 100 mx grey on custom or not 

PS: if you do get a cherry mx blue, be aware that it has a double tapping symptom some people will be prone to notice and subsequently be affected by it. Some gamers may find it very unpleasant especially if they have a double tapping tendency, that maybe some fps skills utilize.

some pro gamers may prefer linear switches that has no tactile feedback, for the fastest response time. this is usually a favourite for people that tend to bottom out when acuating their keycaps. if your a light typer that rarely bottom out, then a tactile switch may be more appropriate.
my recommendation.... cherry mx brown (tactile and comfortable) or red (very soft and linear, very responsive...).... or even the type heaven topre (if you must have the quietest mech keyboard). if budget is a problem, just get a good mkb with either of these switches, and with preferably a key roll over of 6 MININUM !!! especially if your are gamer. I use NKRO, which has no limitations of keys i can press simultaneously. Only games like O2Jam are very affected by the KRO factor.

so once you bought the keyboard you no need to buy anymore after that. Mkb last long, and if you do need to replace, you can swap out the switches for new ones. plate mounted need to desolder, but you can always ask the thread starter to help you. He runs a MKB modding service.

You should try all the 4 mainstream cherry switches and topre switches and make you decision which to buy.

Personally, what MX blue good for typist because, when pressed down it sounds "clicky" when the key registered.
My fingers muscles responds to the sounds and I know whether the key is been pressed or not.
p/s: My typing style is touch typing, so never see the keyboard, sometime really no see screen too.
https://www.dropbox.com/s/mmxo7d4qbb707gs/2...%2011.51.35.jpg
This is my current MX blue keyboard.

For MX brown, i personally think is a very great switch, very very nice to type on. Never feel tired or reach fatigue if type on MX Brown.
Only 1 flaw, I'm not 100% sure whether I really type correctly, my fingers muscle not able to respond accurately due to non-clicky sounds on MX Brown.
Just my 2cents.

Recommendation: brown or blue or mx clear, if you are programmer/software developer/web/writer
If Engineer, cincai choose 1 (doesn't matter)

yes bottom out, means pressing down all the way till you cannot press it down further.

KRO and NKRO mean.... key roll over.... and no key roll over. Simply put it means, how many keys can you press at the same time to register. Like... open your notepad, and try and press 4 Keys together at the same time. See how many of those keys registered. I personally have a NKRO, so i can press how many keys i want simultaneously and it will all register. But we have 10 fingers max, so we literally only need 10kro technically speaking.

so if you press 4, but only 2 showed in notepad, that means you have a 2KRO keyboard.

if press 8 but 6 show up, then you have a 6KRO keyboard.
99% of people are fine with a 6KRO. But some games like o2mania and o2jam require 7KRO for some specific songs. Look at this youtube, see how many keys they have... 7..... so when 7 bars come down, but your keyboard only has 6KRO, you are screwed 

in the future, try to use text expander app or program to boost your productivity.
Remap your keyboard layout to your needs too will helps. i.e. qwerty/colemak/dvorak variants or other variants type of layout
example, I remapped my backspace to caplock, escape to backquote and many many more.
Looking for people with great keyboard layout can share with me, the optimum and best productivity layout. 

Text Expander example software. In fact, there are some program already adapt to this features.
Make your coding easier. Hope it will helps for your future too. 
What language you normally code on?
objective-c? html? php? python?
edit: Text editor like sublime text have built-in text expander.

With the help of mechanical keyboard, I personally experienced that the productivity is boost as much as twice.
To me, mechanical keyboard is a must for people always type 

I'm pretty rich in MKB knowledge today     
---
hooh888 I used to have same keyboard with you, AK300    joined this thread on oct2013 until Black Friday sales only grab my first MKB blue switches, I'm dota2&csgo player, and also a typing kaki, pretty comfort with blue switches (except noisy part  ) GL on getting your MKB

For me personally, my jump towards the mechanical keyboard bandwagon its primarily because I felt the tyyping experience was far more superior than a membrane keyboard feeling.

Prior of getting my own mech keyboard, I tested MX black and browns in the form of a SS 7G & 6G and also a Filco Ninja.... Both switches were nice and suits what I'm looking for...But the switch I really wanted was a red MX which is about as Rare as a Ducky shine 3 TKL now...back then only had SS, Ducky and Filco with either black , brown and clicky blues to toy around... I work as a writer and almost 80 A4s pages with font 9 size I need to type monthly...

So when I decided to pull the trigger, it was a Filco Pink Tenkeyless because 1) it is a tenkeyless and I don't need a numpad 24/7, secondly because it had white keycaps...' I wanted a red switch but it only comes in a limited edition Camo Red bla bla bla, which I didn't prefer...

Ducky was around but its fairly new and trying to get reviews on it like almost close to none. SS i didn't opted because of the braided cable and the hideous keycaps font... Filco looks and feels much better..mine was equipped with a MX brown switch.

For 3 years++ I type on a stock Filco TKL Brown, everything stock and no need to pull and plug back in ever...I was solid and was very dirty thanks to the white keycaps...

My advice is this; DON'T GO TO THE SHOP AND JUST PUT YOUR NASTY FINGERS ON THE KEYBOARD AND CLICKING RUBBISH, Period!

Go and ask for a proper demo, don;'t just click with 2 fingers and judge with your ears and eyes...Judge with your fingers because in the end your fingers do most of the work.

If you straight away click click on the demo or worse, the stock that is for sale, 1) you look noob n rude 2)its not your keyboard yet mang 3)shop keeper or assistant would be cursing you inside their head....

Ask nicely for a sitting demo and try to type naturally like you would on your table. Type away for like 5 minutes and try the next switch that your are interested.... Mechanical keyboards are basically the same, the only difference is maybe the keycaps, illuminated or not, goodies that comes in the package and the package itself. Most plate mounted feels the same most PCB mounted feels the same.

So again, select the switch then select how much you are willing to spend on your tools...